
.banner{
    overflow: hidden;
    position: relative;
    width: 100%;
    height: 350px;
   
}
.long-banner{
    position: absolute;
    width: 400%;
    height: 350px;
}
.long-banner-first{
    display: block;
    overflow: hidden;
    width: 1300px;
    height: 350px;
   
}
.long-banner1{
    background: url(http://p0.jmstatic.com/banner/3477/224720_1920_350_002-web.jpg?1563520325) 50% 0px no-repeat;
}
.long-banner2{
    background: url(http://p0.jmstatic.com/banner/3477/224982_1920_350_002-web.jpg?1563787257) 50% 0px no-repeat;

}
.long-banner3{
    background: url(http://p0.jmstatic.com/banner/3477/224720_1920_350_002-web.jpg?1563520325) 50% 0px no-repeat;

}
.gt{
    margin-top: 25%;
}
.lt{
 margin-top: 25%;
    
}
.go1{
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba($color: #000000, $alpha: 0.3); 
    top: 50%;
    left: 0;
    cursor: pointer;
    z-index: 2;
}
.go2{
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba($color: #000000, $alpha: 0.3); 
    top: 50%;
    right: 0;
    cursor: pointer;
    z-index: 2;
}